binder

In painting, the term "binder" refers to the component of paint that holds the pigment particles together and helps the paint adhere to the surface being painted. It is a crucial ingredient in paint formulations, as it forms the film that remains on the surface after the paint dries.

Key Functions of a Binder:

• Adhesion: Helps the paint stick to the substrate (e.g., walls, timber, metal).
• Durability: Contributes to the paint’s resistance to weather, wear, and chemicals.
• Film Formation: Creates a continuous, protective coating once the paint dries.

Common Types of Binders:

• Acrylic (used in water-based paints)
• Alkyd (used in oil-based paints)
• Epoxy, Polyurethane, and others (used in industrial or specialty coatings)

In Australia, most modern architectural paints use acrylic binders, especially for interior and exterior water-based paints, due to their durability, flexibility, and low VOC content.